DE102006033184A1 - Autocode generator, development tool and method for developing ECU software - Google Patents

Abstract

Autocode generator, development tool and method for developing software for control devices, wherein the code generator (15) is designed such that the code (22) generated therewith for reading into a computer-aided simulation tool (40) and for mapping a controller behavior in this simulation tool (40) is adjusted.

Description

State of the art

The The invention relates to an auto code generator according to the preamble of claim 1, a development tool according to the preamble of Claim 4, and a use of the code generator and a corresponding Development process according to claims 7 and 8.

at the development of ECUs, eg in the field of injection systems for Internal combustion engines, the control unit software must be adjusted by setting certain parameters in the software adapted to a specific experimental vehicle become. To limit the number of required experimental vehicles or completely unnecessary It is therefore advantageous to first open the code running in the control unit a computer running close.

So is it possible, for example, with a computerized Simulation tool such as a CAE (Computer Aided Engineering) tool an optimization loop of the executable control unit code with To close optimization algorithms and thus without test carrier or A relatively expensive hardware-in-the-loop system takes the ECU software offline to parameterize.

Currently, there are approaches to realize the runnability of the ECU C code through converters, as in 1 is shown.

The above figure shows an example of the integration and function of different tools in the development process of the software. The system becomes ASCET-SD as a development tool 30 used for the software, which allows a graphical programming, their basic mechanisms and benefits already in the German patent DE 198 37 871 are disclosed. From the graphically created software specification 20 eg in block diagram definition can then via an auto code generator 10 a business code 21 be generated for ECUs. Under the operating code 21 is understood here as the program code developed for controlling the devices. This can be a C code or as an executable ECU (Electronic Control Unit) -C code, ie as a machine code.

For the following illustration of the behavior of a particular controller, however, an additional converter 11 necessary, the operating code 21 in a simulation code 22 converts, which in turn into a computer-aided simulation tool 40 How a CAE tool can be read and executed or interpreted in it.

Disclosure of the invention

It The object of the present invention is the development process for software of control units To shorten, to reduce the effort required and to avoid possible sources of error. In particular, the invention is intended to test and adapt phase be simplified and shortened within the program development.

These The object is achieved by an auto code generator according to claim 1, which is formed such that the code generated therewith for reading in a computerized Simulation tool and for mapping a controller behavior adapted in this simulation tool.

One essential point of the invention is that these the technology of autocode generation takes advantage. The basic idea is, as a target of development (target) not a target hardware (Hardware target), but to specify a target software (CAE target) for which Simulation code is generated. The technology known per se autocode generation for the target hardware is thus an auto code generation for a simulation software extended. The usually used hardware target is a CAE target replaced. As a result, on the one hand in the prior art still superfluous necessary converter on an operating code such as an executable ECU-C code. Since the code generator according to the invention only requires a corresponding software specification, this is also independent of an additional one Operation code generator functional. Based on the simulation code is an efficient testing the devices possible through simulation.

preferred Further developments of the autocode generator according to the invention are in the subclaims 2 to 4 indicated.

After that is in an advantageous embodiment provided that the simulation code includes parameters on whose Based on the software can be adapted to a given ECU hardware can. This is also a direct simulation of different types and versions of controllers possible.

Depending on The scope of the simulation tool can also be an advantage be if the simulation code in one executable in this tool or in a for this tool is interpretable form. This can be different operate built-up simulation tools with the code from the generator.

The task mentioned above will also is achieved by a software for developing software for control devices according to claim 4, which additionally has the autocode generator described above.

One essential point is that an integrated tool for the known generator for Operation code, as well as the generator for simulation code is available. For example, the system ASCET-SD to the autocode generator according to the invention for CAE tools be extended, whereby the functions created with ASCET-SD with available in the CAE tool Means are determined. It can on known methods of Autocode generation are accessed. By integrating both Code generators under a development tool can be speed up the program development considerably, because no more complicated Access to additional components, ie no additional - error-prone and time-consuming - conversion steps required are.

Prefers In doing so, the operating code of the control units is output as C-code, which is the port allowed on different operating system platforms and thereby greatest flexibility in the hardware targets allows.

Basically it stays Note that the use of the autocode generator according to the invention In any tool for developing software for ECUs is possible, as long as this one Software specification allowed. This makes the code generator special versatile and an acceleration of the test and adaptation phase within the program development out of simpler tools out possible.

The The object mentioned at the outset is also achieved by a method for developing software for ECUs Claim 7 solved, in which generates a program code from a software specification which is used to map a controller behavior in a computer-aided simulation tool is adjusted.

One essential point of the method according to the invention is that this is simple and easy to implement, and out of its execution those already mentioned above Benefits of program development.

A preferred embodiment of the method according to the invention is in dependent claim 8 specified and concerns the possible Parallel generation of operating and simulation code, allowing program development is significantly accelerated.

Brief description of the drawings

Of the Inventive autocode generator, the Development tool and the associated method are described below based on an embodiment explained in more detail.

It demonstrate:

1 a sequence of steps for generating simulation executable program code from a software specification using a conventional auto code generator and an additional converter, and

2 a sequence of steps for generating the same simulation code as in 1 using the autocode generator according to the invention.

embodiments the invention

The 1 shows a sequence of steps for generating simulation-capable program code 22 from a software specification 20 using a conventional auto code generator 10 and an additional converter 11 , as already explained at the beginning. The converter 11 is required by the autocode generator 10 from the software specification 20 of the development tool 30 generated operating code 22 for a controller to convert such that this into a CAE tool 40 readable and can be simulated there. This type of program development uses the additional converter 11 and first the generation of the operating code 21 for the controller ahead. This makes the simulation step complicated, error prone and time consuming.

The 2 shows a sequence of steps for generating the same simulation code 22 as in 1 using the autocode generator according to the invention 15 , From the Ascet-SD 30 generated software specification 20 becomes the detour code without detours 22 which can be read into the CAE tool and simulated - and parameterized - there. Since, as it were, a CAE target is generated directly from the software design, the use of different test carriers becomes superfluous. This was in the prior art 1 still necessary to circumvent the disadvantages of the process shown there. The test and adaptation phase within the program development is thus considerably simplified and shortened, at the same time reducing the number of interfaces as potential sources of error.

In a built-in tool for generating a program code for control devices can also be a conventional auto code generator 10 be provided, the software specification 20 in egg NEN operating code 21 for a controller converts, as indicated by dashed lines in the sequence of steps of the figure. This creates a particularly compact and efficient development tool that enables the generation of operational as well as simulation code 21 . 22 equally possible.

All in all leaves the Auto code generator according to the invention, the development tool and the procedure simplify the Development of software for ECUs to. In particular, the fast simulation option of the software design contributes to shortening the testing and adaptation phase within the program development. Leave it The simulation code quickly changes to different types and versions of control units parameters.

Claims (8)

Computer-aided autocode generator ( 15 ) for generating program code ( 22 ) for ECUs from a software specification ( 20 ), characterized in that the code generator ( 15 ) is designed such that the code generated thereby ( 22 ) for reading into a computer-aided simulation tool ( 40 ) and for mapping a controller behavior in this simulation tool ( 40 ) is adjusted. Code generator ( 15 ) according to claim 1, wherein the simulation code ( 22 ) Includes parameters on the basis of which the developed software can be adapted to a given ECU hardware. Code generator ( 15 ) according to one of the preceding claims, in which the simulation code ( 22 ) in one in the simulation tool ( 40 ) executable or in one for this tool ( 40 ) interpretable form. Computer-aided tool for developing software for ECUs, comprising an autocode generator ( 10 ) for generating operating code ( 21 ) for these devices from a software specification ( 20 ), characterized by an additional auto code generator ( 15 ) according to any one of the preceding claims. Development tool according to Claim 4, in which the operating code ( 21 ) is a C program code. Using an auto code generator ( 15 ) according to one of the preceding claims in a computer-aided development tool for software of control units. A method of developing software for ECUs, which consists of a software specification ( 20 ) a program code ( 22 ) for mapping a controller behavior in a computer-aided simulation tool ( 40 ) is adjusted. Method according to Claim 7, in which an additional operating code ( 21 ) is generated for ECUs.